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| Registros recuperados: 119 | |
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| Svedelius, Nils. |
| The genus Galaxaura can in several respects be classed among the most remarkable Florideae. It is not only — with Chantransia — the genus richest in forms of all the genera belonging to the order of Nemalionales, which has more than 70 described species, it also offers, both in its interior and its exterior organization, such a high differentiation, and a tissue specialization going so far, that, as the monographer of the genus, the late Professor F.R. Kjellman (1900), said: ”it may be difficult even in the great province of the Florideae to find forms with a higher or even as high a division of labour in the tissues of the shoot...“. Even if the number of species may actually diminish with further investigations, this is in a way connected with a... |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/526299 |
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| Krol, G.L.. |
| In 1928 maakte J. Cosijn, als eerste Leidsche student, een begin met de detailkaarteering 1:25000 van een deel der Bergamasker Alpen. Thans is dit werk zoover gevorderd, dat een strook tusschen het Lago di Como en het Ogliodal vrijwel geheel gekaarteerd is. Dat bij zoovele onderzoekers verschil van opvatting over het bepalen van stratigrafische grenzen heerscht, valt niet te verwonderen. Zoo ontstonden feitelijk drie groote problemen, t. w. |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/505789 |
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| Beets, C.. |
| 1. Vorbemerkungen. Lange Zeit kannte man nur eine Art dieser interessanten Gattung aus dem Obereocän der Insel Java, nämlich Buccinulum jogjacartense (Martin) [Martin, 1914, S. 142]. Vor kurzem beschrieb dann Oostingh eine zweite javanische Art, nun aus dem Pliocän von Süd-Bantam (1939, S. 117). Inzwischen hatten aber Wanner und Hahn (1935, S. 250) zwei Arten dieser in der rezenten indopacifischen Fauna nicht vertretenen Gattung als eine Art beschrieben und sie ausserdem unter die Gattung Siphonalia eingereiht. Dank der Freundlichkeit von Herrn Prof. Wanner erhielt ich die Originale dieser Arten zwecks weiterer Untersuchung und konnte dabei feststellen, dass die Beschreibung, welche seinerzeit zwei Arten unter einer einzigen zusammenfasste, nicht... |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/505999 |
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| Wildeman, É. de. |
| En examinant en 1939 dans une note présentée à l’Académie des Sciences de Belgique une étude de M. Ronse, nous avons été amené à reprendre des considérations sur les mucilages des végétaux et en particulier sur ceux des algues (22; 31). Déjà en 1891, dans nos ”Observations algologiques“ nous avons examiné la nature et la structure des parois cellulaires de certaines algues et fait remarquer que la gaine mucilagineuse de Conjuguées, étudiée par divers auteurs était loin de présenter sur toute la surface d’un filament la même épaisseur. Des Spirogyra, par exemple, suivant des parties du filament, montraient une gaine nette et épaisse, ou à peine indiquée. |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/526310 |
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| Umbgrove, J.H.P.. |
| In 1933 and 1935 K. Martin described a new fauna of tertiary Mollusca from asphalt deposits of Buton 1). The collection, consisting of 35 species, shows very characteristic forms, but not a single species is known from recent, pliocene, miocene or eocene deposits. There are some affinities to miocene and recent types and as the fauna is doubtless younger than Mesozoic, Martin had good reasons to consider the fauna younger than the eocene Nanggulan beds of Java but older than the oldest known miocène fauna of the East-Indies (West-Progo beds of Java). He ascribed the Buton fossils to the Upper-Oligocene. According to Hetzel 2), however, the localities of the fossils are situated amidst the so called Sampolakosa-beds of upper-miocene or pliocene age. He... |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/505799 |
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| Beets, C.. |
| Bekanntlich hat K. Martin zweimal (1933, 1935, vgl. auch 1937) einige Mollusken aus dem angeblichen Oberoligocän der Insel Buton beschrieben, auf deren merkwürdige Charaktere er ausdrücklich hinwies. Ich selbst konnte seine Feststellungen an Hand reichlichen neueren Materials nur bestätigen und ergänzen 1): wenn man, es sei an dieser Stelle wiederholt, diese Molluskenfauna auf ihren Zusammenhang mit anderen Faunen hin prüft, so kommt man bald zu der Einsicht, dass zu anderen palaeogenen Faunen fast gar keine Beziehungen bestehen, jedenfalls nicht zu jenen benachbarter Erdteile (diese Verwandtschaftsbeziehungen sind vielleicht bloss Konvergenz-Beispiele); wirklich nahe Beziehungen bestehen nur zu der Neogenfauna nahegelegener Teile des ostindischen... |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/505633 |
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| Beets, C.. |
| Die vorliegende Arbeit stellt ein ausführliches Resumé einer Arbeit in holländischer Sprache dar: „De geologie van het westelijk deel van het Heuvelland van Monferrato tusschen Turijn en Murisengo”, Dissert. Leiden, Augustus 1941 2). Das bearbeitete Gebiet ist bisher, namentlich in tektonischer Hinsicht, nur oberflächlich untersucht worden. Störungen wurden nie erwähnt, Profile waren nur spärlich vorhanden. Da sich die Stratigraphie als ausserordentlich interessant erwies, sobald die feineren Merkmale in einer Karte eingetragen wurden, wie es hier geschah 3), konnte zum ersten Mal ein Schema der sedimentären Genese für einen erheblichen Teil der Berge von Monferrato aufgestellt werden. |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/505807 |
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| Ooststroom, S.J. van. |
| In my first paper on Malaysian Convolvulaceae in Blumea III, 1938, p. 62—94, I pointed out (p. 83) that Neuropeltis racemosa Wall, has often been confounded both in literature and in herbaria with another species from the Malay Peninsula, N. Maingayi Peter. Moreover, on p. 85, I expressed my doubt whether specimens from Indo China, mentioned in literature as N. racemosa Wall, (by Gagnepain & Courchet in Lecomte, Flore Generale de l’Indo-Chine IV, 1915, p. 290, fig. 31) actually belong to that species. A more detailed study of materials from Indo China has now brought to light, that the plants from that country are different from those occurring in the Malay Peninsula and that they represent a new, though closely related, species. Specimens from the... |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/525851 |
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| Verseveldt, J.. |
| INTRODUCTION This paper is to be regarded as a continuation of my previous publication (Verseveldt, 1940 1)). Some three species, sufficient material of which for an anatomical examination was available, had then to remain undiscussed; they are: Semperina rubra Kö11., Anthothela macrocalyx (Nutt.) (= Suberia macrocalyx Nutting (1911) = Semperina macrocalyx (Nutt.) Kukenthal (1919)) and Sibogagorgia weberi Stiasny, which species have been examined by me in the same way as formerly the others. It has become clear to me that the second of the species mentioned cannot be considered as belonging either to the genus Suberia Studer or the genus Semperina Kö11. A close relationship with Anthothela grandiflora (M. Sors) caused me to decide on the name Anthothela... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.72. |
| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/319166 |
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| Westerveld, J.. |
| The Pasoemah region S of the Goemai Mts. in W. Palembang is largely occupied by Quaternary volcanics, which form a sharply dissected plateaulike country, whose surface gradually slopes downward in an ENE direction from ± 1000 m to ± 300 m above sea-level, conformably to the courses of the Selangis and Lematang Rivers above their point of confluence. Where the Lematang River unites with the Moelak River, the acid welded tuffs of the Pasoemah highland, to which attention will be drawn in this paper, are cut off by a steep bluff, formed undoubtedly by retrogressive erosion, which was substantially facilitated by the presence of vertical cleavage planes in the rhyolitic tuff series. In the Goemai Mts., described elsewhere in detail by K.A.F.R. Musper (1937)... |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/505700 |
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| Swart, J.J.. |
| This paper contains the diagnoses in Latin of a new genus, new sections of some genera, several new species and a number of new varieties which will be dealt with by the author in English in a publication entitled: “A monograph of the genus Protium and some allied genera (Burseraceae)”, to be published in Rec. Trav. bot. néerl. XXXIX, p. 211 (1942) and in Meded. bot. Mus. en Herb. Utrecht 90 (1942). Protium BURM.f. sectio Eu-Protium SWART n. sect. |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/535137 |
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| Heimans, J.. |
| In the winter and early spring of 1916 Mrs. Anna Weber-van Bosse at her hospitable residence near Eerbeek initiated me in the study of Freshwater Algae. For several years after that date in numerous trips all over this country I collected and studied some thousands of samples from all kinds of freshwater ponds and lakes, canals and streams. The Desmids soon drew my special attention, when an unexpectedly rich and varied Desmid flora was found in certain fens and ponds in the diluvial and moor districts of our country. |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/526352 |
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| Bremekamp, C.E.B.. |
| Among the Acanthaceae grown in the glasshouses of the University Botanic Garden, Utrecht, a plant labelled Aphelandra velutina drew my attention, first, because it obviously belonged to an entirely different genus, and secondly, because a description under this name could nowhere be found. The coincidence of these two grounds for bewilderment might be explained by assuming that Aphelandra was merely a perversion, probably caused by the inadvertency of a transcriber, of the true generic name. This sounded plausible enough, but the name itself could not be found, for all attempts to refer the plant to one of the existing genera failed. It looked as if the plant might have been described somewhere, but for the time being there was no indication at all as to... |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/535020 |
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| Engel, H.. |
| Diagnosis. Aplysiidae of conical form, narrower in front, wide and obliquely truncate behind. Integument more or less warty, the warts bearing villi; warts and villi being wholly retractile. Parapodia united, save for a dorsal slit; the free lobes covering the slit leave two conspicuous respiratory openings, one at the posterior and one at the anterior 'end. The posterior respiratory opening, corresponding to the mantle-siphon, lies about in the middle of the posterior disc, the anterior opening outside the disc, somewhat in front of the disc's anterior margin. Shell solid, hatchetshaped, the free spire calloused. Penis armed or unarmed. Radula with inconspicuous, often reduced rhachidian tooth and many laterals with long simple cusps. Short history of the... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.73. |
| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/318863 |
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| Beets, C.. |
| 1. Es sind bisher über die merkwürdige rezente marine Gastropoden-Gruppe Thatcheria Angas, 1877 sehr wenige Gegebenheiten bekannt, vergleichende Untersuchungen mit fossilen Arten fehlen (fast) vollkommen und auch die Frage ihrer systematischen Stellung ist nie in befriedigender Weise gelöst worden. Auf Grund vergleichender Forschungen bei der Bestimmung gewisser fossiler, systematisch schwieriger, doch morphologisch einfacher ostindischer Arten glaube ich diese Frage endlich — jedenfalls zum grössten Teil — lösen zu können, dank auch der von N.B. Eales ausgeführten anatomischen Untersuchung der einzigen lebenden Art dieser „Gattung”. Angas beschrieb 1877 eine Schale der hiesigen Art, Thatcheria mirabilis von Japan; er betrachtete sie vorläufig als Glied... |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/505991 |
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| Koster, Joséphine Th.; Benthem Jutting, Tera S.S. van. |
| Anne Antoinette van Bosse, fille de M. Jacob van Bosse et de Mme Jaqueline Jeanne née Reynvaan, naquit à Amsterdam le 27 mars 1852. Très jeune encore elle perdit sa mère; sa soeur, son ainée de 10 ans, prit sa place aussi bien qu’elle put. Outre cette soeur elle avait trois frères. Selon l’usage de cette époque les familles aisées n’envoyaient pas leurs filles à l’école, ainsi Anna van Bosse reçut à la maison son instruction par une institutrice de nationalité suisse. La botanique et la zoologie furent d’emblée ses branches préférées; les fréquentes visites au jardin zoologique ”Artis“ y contribuèrent pour une grande part. l’Observation des animaux exotiques lui procurait un grand plaisir et jusqu’à présent elle porte un grand intêret à ”Artis“. |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/526297 |
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| Vlerk, I.M. van der. |
| The plates I—XI contain illustrations of all the skulls and horn-cores of Bovidae from the Quaternary of the Netherlands, brought together in the National Museum of Geology at Leyden, Holland. They were all photographed with the occiputs vertical or what is thought to be vertical. They are described in the same order as figured. On the plates I—V are represented the skulls and horn-cores of the domesticated cows. Four races are distinguished among them: the brachyceros-race (fig. 1—25), the frontosus-race (fig. 26), the primigenius-race (fig. 27—41) and the trochoceros-race (fig. 42—46). The brachyceros-skulls and horn-cores have the following characteristics: a sharp angle (30°—50°) between the plane of curvature of the horn-cores and the horizontal... |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/505932 |
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| Henrard, J.Th.. |
| During the preparation of an account of the grasses for the flora of Dutch Guiana many difficulties were found in the identification of species of the genus Axonopus. Our knowledge as to the most recent treatment is entirely based upon Doell’s work for the Flora Brasiliensis. It is, however, evident that Doell did not see many types and his concept of many species proves to be incorrect. The modern genus Axonopus is not accepted by Doell but treated by him as a section Emprosthion of the large genus Paspalum. The difficulties arose already when he treated Fluegge’s Paspalum furcatum which is a continental North American species. Raddi’s Paspalum obtusifolium from Brazil, although given as a synonym, is a quite distinct species. As another synonym is... |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/525576 |
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| Schuurmans-Stekhoven Jr., J.H.. |
| In 1933 Dr. G. J. van Oordt together with a number of biological students made an excursion to the Camargue. During that trip he collected some samples of mud from brackish ponds and pools in the Rhône Delta, which collection he entrusted me for further research. At this place I will bring him my renewed thanks for his contribution to nematology. Although the collection was not great, it brought to light some interesting new species. Moreover it allows us to say something about the penetration of marine forms into brackish waters. A comparison of the list of forms given below with the lists I have given from Nematodes found to occur in the former Zuidersea shows that the penetration of marine forms into brackish waters in the Mediterranean is performed in... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.79. |
| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/318897 |
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| Heide, S. van der. |
| L’histoire géologique de Monferrato est marquée par une série de transgressions et de régressions de la mer, qui se manifestent généralement d’une manière très distincte dans la partie orientale de ces collines. Nous avons résumé cette histoire schématiquement dans la fig. 3 1). Dans les règles qui suivent nous décrirons à grands traits le développement de la partie orientale du bassin de Monferrato à partir du Jurassique jusqu’à la fin du Pliocène. Pendant le Jurassique et le Crétacé un grand bassin assez profond (mais certainement pas abyssal) s’étendait des Alpes occidentales (schistes lustrés) jusqu’au SE de Bologna. Ce bassin était entouré de terre ayant peu ou point de relief, de sorte qu’il y avait peu de transport de matériaux terrigènes. Des... |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/506011 |
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| Registros recuperados: 119 | |
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